In high-voltage power systems, protecting expensive infrastructure from transient overvoltages—such as lightning strikes or switching surges—is critical. The IEC 60099 series of standards governs the design, testing, and application of surge arresters. While IEC 60099-4 focuses on the requirements for metal-oxide surge arresters (MOSA) without gaps, serves as the vital application guide .
The IEC 60099-5:2018 standard can be accessed for purchase directly through the Official IEC Store iec 600995 pdf link
Its main features include:
The serves as the ultimate international framework for the selection, application, and coordination of surge arresters in high-voltage three-phase electrical systems. Formally titled "Surge arresters - Part 5: Selection and application recommendations," this document offers critical methodology for protection engineers looking to defend power grids against overvoltage anomalies. In high-voltage power systems